Improved thermal and photostability of an anthraquinone dye by intercalation in a zinc–aluminum layered double hydroxides host

Improvement of the thermal stability of near-infrared-absorbing heptamethinecyanine dyes by anion-exchange from an iodide to fluorine-containing anions

“…However, most NIRabsorbing dyes have serious drawbacks, such as low chemical, thermal, and photo stability. To improve the thermal stability, considerable effort has been devoted to prepare inorganic-organic hybrid dyes, e.g., the intercalation of organic dyes with layered double hydroxides (LDH) has recently been developed [2]. However, there are only a few reports on near-IR-absorbing dyes consisting of fully organic components with thermal stability [3].…”

Preparation of 4,4′-diaminostilbene-2,2′-disulfonic acid intercalated LDH/polypropylene nanocomposites with enhanced UV absorption property

“…In this contribution, we used our newly developed aqueous miscible organic solvent treatment method (AMOST) to modify the surface characteristics of the LDH nanoparticles. We term these AMO‐LDHs, which are hydrophobic and readily disperse in aromatic hydrocarbons . A solvent mixing method was employed to synthesize polymer/LDHs nanocomposites, and our previous work has demonstrated that AMO‐LDHs nanoparticles can be successfully introduced into PP with a good dispersion by using this method .…”

Synthesis and characterisation of dye­intercalated nickel­aluminium layered­double hydroxide as a cosmetic pigment

“…However, to be intercalated into LDH, the dye must be anionic in nature. Monovalent anionic dyes, such as Acid Yellow 17 [11], Methyl Red [12,13], Mordant Yellow 3 [15], Acid Yellow 49 [16], and also bi-anionic Acid Green 28 are mentioned in literature [17]. It should be noted that all anionic dyes can be used.…”

“…1) synthesis of LDH with inorganic anions, using coprecipitation at high supersaturation [11,16,17], coprecipitation at constant рН [9,24], homogeneous coprecipitation [37], etc. ;…”

“…A general formula for divalent metal-based LDH is ( ) ( Use of LDH with various cation compositions and different organic anionic dyes would allow broadening the color range of pigments, especially for cosmetic applications. For instance, Zn-Al and Acid Yellow 17 [11], Mg-Al and o-Methyl Red [12], Ni-Fe and o-Methyl Red [13], Zn-Al and Mordant Yellow 3 [14,15], Zn-Al and Acid Yellow 3 [16], Zn-Al and bi-anion Acid Green 28 [17]. Therefore, the synthesis of dye-intercalated LDH is of relevance.…”